{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:YDC4CTZXS2SBTT6473MK2BA4J2","short_pith_number":"pith:YDC4CTZX","canonical_record":{"source":{"id":"1609.04893","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-16T00:48:11Z","cross_cats_sorted":[],"title_canon_sha256":"c1b12464539310ecfc0200a6c8a89541f1e5fb5299e7fa179a9c3ecb136b8193","abstract_canon_sha256":"0a71373c66fe945fcb6cefb88f9edbac99f6bf89edb2bdb41e5452a94532588a"},"schema_version":"1.0"},"canonical_sha256":"c0c5c14f3796a419cfdcfed8ad041c4eb29e20c20bb3934ec4161a06d4440fd9","source":{"kind":"arxiv","id":"1609.04893","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04893","created_at":"2026-05-18T00:50:19Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04893v2","created_at":"2026-05-18T00:50:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04893","created_at":"2026-05-18T00:50:19Z"},{"alias_kind":"pith_short_12","alias_value":"YDC4CTZXS2SB","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YDC4CTZXS2SBTT64","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YDC4CTZX","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:YDC4CTZXS2SBTT6473MK2BA4J2","target":"record","payload":{"canonical_record":{"source":{"id":"1609.04893","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-16T00:48:11Z","cross_cats_sorted":[],"title_canon_sha256":"c1b12464539310ecfc0200a6c8a89541f1e5fb5299e7fa179a9c3ecb136b8193","abstract_canon_sha256":"0a71373c66fe945fcb6cefb88f9edbac99f6bf89edb2bdb41e5452a94532588a"},"schema_version":"1.0"},"canonical_sha256":"c0c5c14f3796a419cfdcfed8ad041c4eb29e20c20bb3934ec4161a06d4440fd9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:19.093389Z","signature_b64":"6zNOzpC07ISmJq5Psh/VgrBAklJYA19mMNL8CbndCsE54V4NVNYeZy3j5GJMJKtOOKIJ+9RH+5+7IKRsDGOIBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c0c5c14f3796a419cfdcfed8ad041c4eb29e20c20bb3934ec4161a06d4440fd9","last_reissued_at":"2026-05-18T00:50:19.092867Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:19.092867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.04893","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E6QzdloUoFHHNwUrNmDSYKc+jfXRPsXyMuFKsquxG4T2Hpv4IjJxcD0Jc2umu9GFPrz5YTA3o2JXsCLZQ/mDDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T22:18:34.591026Z"},"content_sha256":"79f12d7eb2fb16f14581bf0fd077d89c407483b62dfe1f445a13c43633eb9ac1","schema_version":"1.0","event_id":"sha256:79f12d7eb2fb16f14581bf0fd077d89c407483b62dfe1f445a13c43633eb9ac1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:YDC4CTZXS2SBTT6473MK2BA4J2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SN1991bg-like supernovae are a compelling source of most Galactic antimatter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Ashley J. Ruiter, Fiona H. Panther, Ivo R. Seitenzahl, Roland M. Crocker","submitted_at":"2016-09-16T00:48:11Z","abstract_excerpt":"The Milky Way Galaxy glows with the soft gamma ray emission resulting from the annihilation of $\\sim 5 \\times 10^{43}$ electron-positron pairs every second. The origin of this vast quantity of antimatter and the peculiar morphology of the 511keV gamma ray line resulting from this annihilation have been the subject of debate for almost half a century. Most obvious positron sources are associated with star forming regions and cannot explain the rate of positron annihilation in the Galactic bulge, which last saw star formation some $10\\,\\mathrm{Gyr}$ ago, or else violate stringent constraints on "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04893","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EF4qT346ZLN8yGweIjiuiSJPI1ZtMUaj3EpNG1BT+bECuboeuiPT00Q714NILCk+VShRkO5qBnDA2vByPamRDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T22:18:34.591385Z"},"content_sha256":"ab62a2f33f622d47d6a116203ba1d06cff5d8bcd41d42806c24683d128ef7151","schema_version":"1.0","event_id":"sha256:ab62a2f33f622d47d6a116203ba1d06cff5d8bcd41d42806c24683d128ef7151"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YDC4CTZXS2SBTT6473MK2BA4J2/bundle.json","state_url":"https://pith.science/pith/YDC4CTZXS2SBTT6473MK2BA4J2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YDC4CTZXS2SBTT6473MK2BA4J2/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-19T22:18:34Z","links":{"resolver":"https://pith.science/pith/YDC4CTZXS2SBTT6473MK2BA4J2","bundle":"https://pith.science/pith/YDC4CTZXS2SBTT6473MK2BA4J2/bundle.json","state":"https://pith.science/pith/YDC4CTZXS2SBTT6473MK2BA4J2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YDC4CTZXS2SBTT6473MK2BA4J2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:YDC4CTZXS2SBTT6473MK2BA4J2","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0a71373c66fe945fcb6cefb88f9edbac99f6bf89edb2bdb41e5452a94532588a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-16T00:48:11Z","title_canon_sha256":"c1b12464539310ecfc0200a6c8a89541f1e5fb5299e7fa179a9c3ecb136b8193"},"schema_version":"1.0","source":{"id":"1609.04893","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04893","created_at":"2026-05-18T00:50:19Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04893v2","created_at":"2026-05-18T00:50:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04893","created_at":"2026-05-18T00:50:19Z"},{"alias_kind":"pith_short_12","alias_value":"YDC4CTZXS2SB","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YDC4CTZXS2SBTT64","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YDC4CTZX","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:ab62a2f33f622d47d6a116203ba1d06cff5d8bcd41d42806c24683d128ef7151","target":"graph","created_at":"2026-05-18T00:50:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The Milky Way Galaxy glows with the soft gamma ray emission resulting from the annihilation of $\\sim 5 \\times 10^{43}$ electron-positron pairs every second. The origin of this vast quantity of antimatter and the peculiar morphology of the 511keV gamma ray line resulting from this annihilation have been the subject of debate for almost half a century. Most obvious positron sources are associated with star forming regions and cannot explain the rate of positron annihilation in the Galactic bulge, which last saw star formation some $10\\,\\mathrm{Gyr}$ ago, or else violate stringent constraints on ","authors_text":"Ashley J. Ruiter, Fiona H. Panther, Ivo R. Seitenzahl, Roland M. Crocker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-16T00:48:11Z","title":"SN1991bg-like supernovae are a compelling source of most Galactic antimatter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04893","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:79f12d7eb2fb16f14581bf0fd077d89c407483b62dfe1f445a13c43633eb9ac1","target":"record","created_at":"2026-05-18T00:50:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0a71373c66fe945fcb6cefb88f9edbac99f6bf89edb2bdb41e5452a94532588a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-16T00:48:11Z","title_canon_sha256":"c1b12464539310ecfc0200a6c8a89541f1e5fb5299e7fa179a9c3ecb136b8193"},"schema_version":"1.0","source":{"id":"1609.04893","kind":"arxiv","version":2}},"canonical_sha256":"c0c5c14f3796a419cfdcfed8ad041c4eb29e20c20bb3934ec4161a06d4440fd9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c0c5c14f3796a419cfdcfed8ad041c4eb29e20c20bb3934ec4161a06d4440fd9","first_computed_at":"2026-05-18T00:50:19.092867Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:19.092867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6zNOzpC07ISmJq5Psh/VgrBAklJYA19mMNL8CbndCsE54V4NVNYeZy3j5GJMJKtOOKIJ+9RH+5+7IKRsDGOIBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:19.093389Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.04893","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79f12d7eb2fb16f14581bf0fd077d89c407483b62dfe1f445a13c43633eb9ac1","sha256:ab62a2f33f622d47d6a116203ba1d06cff5d8bcd41d42806c24683d128ef7151"],"state_sha256":"e704d1b1fb7ee105732ff66333a528f1dbcd841f6bdec7e0736cb9a664882641"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MFNSQUu5i+ryl26a500By4yAx0TO+YX8fpCQt+JmrN5Pt+DDWydPW5/1Wln/X7IFnN+Rfc+8iLe/D7aQtNUBDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T22:18:34.593458Z","bundle_sha256":"a0b64f6d0afbf4154149fb3b755cdacba2dbfa47d5f1871b6dace7b7596f396d"}}